16. Pedro and Maria own a parcel pf land located near Emilio Aguinaldo College - Cavite measuring an area of amount of 12,000,000.00 (12M) in Peso. To secure the property, Juan paid the whole amount of 12M property to her neighbor Petra for 12,000,001.00 in Peso whom the later always wanted to buy. Since the property . Petra not knowing the previous transaction, paid the whole amount of 12,000,001.00 which was received by Pedro and Maria. Is there a double sale?